Handle mounting structure

ABSTRACT

A handle mounting structure includes a handle including a handle shaft with a sliding space defined in one side thereof and a mounting unit located at one end thereof, a locking mechanism including an insert plate slidably inserted into the sliding space and a torsion spring mounted in the sliding space and stopped between the handle and the insert plate to impart a pressure to the insert plate toward the outside of the sliding space, and a positioning device including a flat base pivotally coupled to the handle and a hook block located at a bottom side of the flat base. The handle can be fastened to a sliding box of a cabinet through locking mechanism and the positioning device, so that the handle is not easily separated from the sliding box, and the sliding box can be surely pulled out of or pushed into the cabinet through the handle.

BACKGROUND OF THE INVENTION 1. Field of the Invention

The present invention relates to a handle mounting structure consistingof a handle, a locking mechanism and a positioning device for quickinstallation in a sliding box of a cabinet, which has a low-profilecharacteristic.

2. Description of the Related Art

With the rapid development of electronic technology, computer technologybrings convenience, comfort, speed and other high-efficiency functionsto people's life and work, so the application function of electronictechnology and computer systems is getting stronger and stronger, theapplication scope is getting wider and wider. Except personal computersfor personal application, industrial computer rooms, building centralcontrol systems, central control systems of automated plant operationsystems, central processing control systems for video and audioplayback, etc., are controlled through centralized management bymounting multiple computer hosts, servers, conversion systems inrespective sliding boxes that are arranged in a stack inside a cabinet,facilitating operating system installation and individual systemmaintenance and control. When performing a computer operating systeminspecting or updating operation, the sliding boxes must be pulled outof the cabinet one after another. In order to facilitate installation ofeach individual sliding box in the cabinet or pulling each individualsliding box out of the cabinet, each individual sliding box is equippedwith a retaining structure.

However, since the current electronic products are developing towardlight, thin, short, and small designs, the cabinet and the internalsliding boxes must be designed to be smaller and smaller. When thesliding box design is getting smaller and smaller, the retainingstructure used on the sliding box is bound to be light, thin, short, andsmall. Therefore, how to make the retaining structure light, thin, shortand small, and at the same time has a good retaining effect andstructural strength, which is the direction that the relevant industryis eager to study and improve.

SUMMARY OF THE INVENTION

The present invention has been accomplished under the circumstances inview. It is therefore the main object of the present invention toprovide a handle mounting structure, which comprises a handle, a lockingmechanism and a positioning device. The handle comprises a handle shaft,a sliding space defined in one side of the handle shaft and a mountingunit located at one end of the handle shaft. The locking mechanism ismounted in the sliding space of the handle, comprising an insert plateslidably inserted into the sliding space and a torsion spring mounted inthe sliding space of the handle and stopped between the handle and theinsert plate to impart a pressure to the insert plate toward the outsideof the sliding space. The torsion spring comprises a coiled positioningportion mounted to the handle shaft within the sliding space, anabutment end piece extended from one end of the coiled positioningportion and stopped against the insert plate, and a mounting end pieceextended from an opposite end of the coiled positioning portion andpositioned in the sliding space. The positioning device comprises a flatbase pivotally coupled to the mounting unit of the handle, and a hookblock located at a bottom side of the flat base. The handle can befastened to a sliding box of a cabinet through the locking mechanism andthe positioning device, so that the handle is not easily separated fromthe sliding box, and the sliding box can be surely pulled out of orpushed into the cabinet through the handle. Further, the windingdirection of the coiled positioning portion of the torsion spring of thelocking mechanism is parallel to the length direction of the handle sothat the thickness of the handle mounting structure can be minimized forapplication to electronic products having light, thin, short and smallcharacteristics.

According to another aspect of the present invention, the outer cover ofthe locking mechanism is detachably mounted in the sliding space of thehandle, facilitating replacement of the torsion spring after dismountingof the outer cover. Further, the outer cover is set in position by meansof engaging the positioning lugs thereof into the two opposite gaps inhandle shaft without additional fastening members, facilitating quickinstallation.

According to another aspect of the present invention, the insert plateof the locking mechanism is supported on the torsion spring for forwardand backward movement in the sliding space of the handle, improving theoverall actuation. Thus, the invention can tolerate more errors, therebyreducing the precision and difficulty in manufacturing. Further, theinvention is applicable to different sizes and types of cabinets.

According to still another aspect of the present invention, the hookblock of the positioning device is hooked in the retaining slot of theseat plate of the sliding box to secure the handle firmly in positionafter connection of the handle to the sliding box of the cabinet,locking the sliding box to the cabinet without vibration.

According to still another aspect of the present invention, the twoposition-limiting plates are curved from two opposite lateral sides ofthe handle shaft of the handle in direction toward each other, so thatgaps are defined between the position-limiting plates and the handleshaft at two opposite lateral sides for the installation of the outercover without significantly increasing the thickness of the handle.Further, the outer cover can be used to protect the torsion springagainst impact and dust, prolonging the service life of the torsionspring.

According to still another aspect of the present invention, the twoposition-limiting plates are curved from two opposite lateral sides ofthe handle shaft of the handle in direction toward each other to formthe respective arc-shaped lead edges that enhance the structuralstrength of the handle and facilitating grasping of the user's hand in acomfortable manner.

Other and further benefits, advantages and features of the presentinvention will be understood by reference to the following specificationin conjunction with the accompanying drawings, in which like referencecharacters denote like elements of structure.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an oblique top elevational view of a handle mounting structurein accordance with the present invention.

FIG. 2 is an exploded view of the handle mounting structure inaccordance with the present invention.

FIG. 3 corresponds to FIG. 2 when viewed from another angle.

FIG. 4 is a sectional side of the handle mounting structure inaccordance with the present invention.

FIG. 5 is a schematic top view illustrating mounting of the handlemounting structure to a cabinet (I).

FIG. 6 is a schematic top view illustrating mounting of the handlemounting structure to a cabinet (II).

FIG. 7 is a schematic top view illustrating dismounting of the handlemounting structure from cabinet (I).

FIG. 8 is a schematic top view illustrating dismounting of the handlemounting structure from cabinet (II).

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIGS. 1 and 2, a handle mounting structure in accordancewith the present invention is shown. The handle mounting structurecomprises a handle 1, a locking mechanism 2 and a positioning device 3.

The handle 1 comprises a handle shaft 11, two position-limiting plates111 respectively curved from two opposite lateral sides of the handleshaft 11 in direction toward each other with a gap 110 defined betweeneach position-limiting plate 111 and the handle shaft 11, a streamlinetype grip 112 extended from at least one side of the position-limitingplate 111, a sliding space 12 defined in a side of an opposing internalof the two position-limiting plates 111, an opening 120 defined in aside of the sliding space 12, a mounting hole 121, a locating hole 122and a positioning hole 123 cut through the sliding space 12, and amounting unit 13 extended from the handle shaft 11 and disposed at anopposite side of the sliding space 12. The mounting unit 13 comprises amounting plate 131 extended from the handle shaft 11, a mounting throughhole 132 cut through the mounting plate 131, an accommodation notch 133located on a top side of the mounting plate 131, a swirl space 134defined in the bottom side of the mounting plate 131, and a top edge 135disposed at an inner side of the swirl space 134 and neighbored to thehandle shaft 11. Further, two position-limiting plates 111 comprises aplurality of insertion grooves 1111 located on an inner side thereof andfacing toward the sliding space 12, and an arc-shaped lead angle 1112located on an opposing outer side thereof.

The locking mechanism 2 comprises an insert plate 21, a torsion spring22, a positioning axle 23, a connection axle 24 and an outer cover 25.The insert plate 21 is a flat member, comprising an oblong sliding slot211 cut through two opposite sides thereof, a beveled sliding edge 212located on one side thereof, a notch-shaped retaining edge 213neighbored to a top side of the beveled sliding edge 212, and anabutment edge 214 located on an opposite side thereof for abutmentagainst one end of the torsion spring 22. The torsion spring 22 is madeof an elastic wire material (such as metal, rubber, plastic, syntheticresin or the like), comprising a coiled positioning portion 221 ofwinding direction parallel to the length direction of the handle 1, athrough hole 2210 defined in the center of the coiled positioningportion 221, an abutment end piece 222 extended from one end of thecoiled positioning portion 221 for abutment against the abutment edge214 and defining with the horizontal line of the coiled positioningportion 221 a predetermined contained angle θ, and a mounting end piece223 extended from one end of the coiled positioning portion 221. Thepositioning axle 23 has a shank 231 thereof inserted through the throughhole 2210 in the coiled positioning portion 221 of the torsion spring22. The connection axle 24 is inserted through the oblong sliding slot211 of the insert plate 21. The outer cover 25 is covered on the insertplate 21, comprising a through hole 251 for the insertion of theconnection axle 24, a stop plate 252 extended from one side thereof anddefining an abutment surface 2521 for abutting the mounting end piece223, a mounting through hole 253 cut through the stop plate 252 for themounting of a fastening member 2531, and at least one positioning lug254 extended from two opposite lateral sides of the outer cover 25.

The positioning device 3 comprises a flat base 31, a finger block 311and a L-shaped hook block 32 respectively extended from opposing top andbottom sides of one end of the flat base 31, extended from flat base 31,a beveled guide edge 321 located on a front bottom side of the hookblock 32, an engagement groove 33 defined in an opposite end of the flatbase 31, a spring member 331 loaded in the engagement groove 33, an axlehole 34 cut through the flat base 31, and a pivot axle 341 mounted inthe axle hole 34.

Further, the contained angle θ defined between the abutment end piece222 and coiled positioning portion 221 of the torsion spring 22 iswithin 0˜90°.

In installation, insert the insert plate 21 of the locking mechanism 2into the sliding space 12 of the handle 1 to let the beveled slidingedge 212 and retaining edge 213 of the insert plate 21 expose outsidethe opening 120 of the sliding space 12 and to keep the oblong slidingslot 211 of the insert plate 21 in axial alignment with the mountinghole 121, where the position-limiting plates 111 of the handle shaft 11are stopped at the opposing top and bottom sides of the insert plate 21for allowing the insert plate 21 to be stably moved in and out of thesliding space 12, then mount the positioning axle 23 in the locatinghole 122, and then mount the coiled positioning portion 221 of thetorsion spring 22 on the positioning axle 23 to let the shank 231 of thepositioning axle 23 be inserted into the through hole 2210 in the coiledpositioning portion 221, and then cover the outer cover 25 over thesliding space 12 to insert the positioning lugs 254 of the outer cover25 through the respective insertion grooves 1111 of theposition-limiting plates 111 into the gaps 110 and push the outer cover25 forward relative to the handle shaft 11 to keep the through hole 251of the outer cover 25 in axial alignment with the mounting hole 121 andthe oblong sliding slot 211 and the mounting through hole 253 of theouter cover 25 in axial alignment with the positioning hole 123, andthen insert the connection axle 24 through the mounting hole 121, theoblong sliding slot 211 and the through hole 251, and the fasten thefastening member 2531 to the mounting through hole 253 of the outercover 25 and the positioning hole 123 of the handle 1 to affix the outercover 25 to the sliding space 12 of the handle 1. After installation ofthe outer cover 25 in the sliding space 12, the abutment end piece 222of the torsion spring 22 is set in abutment against the abutment edge214 of the insert plate 21 and the mounting end piece 223 of the torsionspring 22 is set in abutment against the abutment surface 2521 of thestop plate 252 of the outer cover 25. Thus, the locking mechanism 2 isinstalled in the handle 1.

After installation of the locking mechanism 2 in the handle 1, mount theflat base 31 of the positioning device 3 to the mounting unit 13 of thehandle 1 by: inserting the mounting plate 131 of the mounting unit 13into the engagement groove 33 of the flat base 31, then load the springmember 331 into the engagement groove 33 within the accommodation notch133 of the mounting plate 131, and then mount the pivot axle 341 in theaxle hole 34 and the mounting through hole 132 of the mounting unit 1.At this point, the flat base 31 is abutted against the stop edge 135 ofthe mounting unit 13. When the finger block 311 of the flat base 31 isbiased by an external force, the flat base 31 is turned about the axisof the axle hole 34 relative to the mounting unit 13, and the inner wallof the engagement groove 33 is forced to compress the spring member 331.When the biasing force is released from flat base 31, the elasticrestoring energy of the spring member 331 immediately returns the flatbase 31 into the swirl space 134. Thus, the handle 1, the lockingmechanism 2 and the positioning device 3 are assembled to constitute thehandle mounting structure.

In the present preferred embodiment, the outer cover 25 of the lockingmechanism 2 comprises a plurality of positioning lugs 254 at each of thetwo opposite lateral sides thereof corresponding to the respectivemultiple insertion grooves 1111 on each of the two position-limitingplates 111, allowing the outer cover 25 to directly shield the slidingspace 12 of the handle 1 and the positioning lugs 254 to be engaged intothe respective multiple insertion grooves 1111. In another embodiment ofthe present invention, one single positioning lug 254 is provided ateach of the two opposite lateral sides of the outer cover 25 (notshown). Alternatively, the position-limiting plates 111 can beconfigured without the aforesaid insertion grooves 1111. In this case,the outer cover 25 is directly inserted through the opening 120 into thesliding space 12 to force the positioning lugs 254 into the gaps 110into friction engagement with respective inner surfaces of theposition-limiting plates 111. After installation, the outer cover 25keeps the sliding space 12 from sight.

Referring to FIGS. 5-8, in application of the handle mounting structure,the handle 1 is fastened to a seat plate 42 of a sliding box 41 in acabinet 4 of a computer system. The seat plate 42 has a through hole 420for the riveting of the connection axle 24 of the locking mechanism 2 tosecure the handle 1 and the locking mechanism 2 to the through hole 420of the seat plate 42. The seat plate 42 further provides a retainingslot 421 remote from the through hole 420. When the user biases the grip112 of the handle shaft 11, the handle shaft 11 is moved to make asector movement about the center of the through hole 420 of the seatplate 42 and the axis of the connection axle 24, the retaining edge 213of the insert plate 21 of the locking mechanism 2 is engaged into anengagement hole 40 of the cabinet 4. Thereafter, push the handle shaft11. At this point, the inner wall of the engagement hole 40 is abuttedagainst the beveled sliding edge 212 of the insert plate 21, causing theabutment edge 214 of the insert plate 21 to compress the abutment endpiece 222 of the torsion spring 22, and thus, the insert plate 21 ismoved toward the inside of the sliding space 12 of the handle 1. At thistime, the beveled sliding edge 212 of the insert plate 21 is smoothlyforced into the engagement hole 40. After the beveled sliding edge 212entered the engagement hole 40, the inside wall of the engagement hole40 is released from the insert plate 21, allowing the abutment end piece222 of the torsion spring 22 to return to its former shape and to pushthe insert plate 21 into the engagement hole 40, causing engagementbetween the retaining edge 213 of the insert plate 21 and the borderedge of the engagement hole 40.

During the process of engaging the locking mechanism 2 into theengagement hole 40, the beveled guide edge 321 of the hook block 32 ofthe positioning device 3 is guided by the seat plate 42 so that the flatbase 31 is biased outward in the swirl space 134, causing the inner wallof the engagement groove 33 to compress the spring member 331. Once thebeveled guide edge 321 of the hook block 32 is released from the seatplate 42, the spring member 331 immediately returns to its former shape,and thus, the flat base 31 is returned to its former position. At thistime, the hook block 32 of the positioning device 3 is hooked in theretaining slot 421 to secure the sliding box 41 firmly in the cabinet 4,and the handle 1 is positively secured to the cabinet 4 withoutvibration.

When wishing to pull the sliding box 41 out of the cabinet 4, bias thefinger block 311 of the flat base 31 outwardly to disengage the hookblock 32 of the positioning device 3 from the retaining slot 421 of theseat plate 42, and then bias the handle shaft 11 to move the insertplate 21 of the locking mechanism 2, forcing the beveled sliding edge212 of the insert plate 21 against the inner wall of the engagement hole40 of the cabinet 4. At this point, the abutment edge 214 of the insertplate 21 is forced against the abutment end piece 222 of the torsionspring 22 to compress the torsion spring 22 in the sliding space 12.Thereafter, pull the handle shaft 11 outward, and then rotate the handleshaft 11 to move the beveled sliding edge 212 of the insert plate 21 outof the engagement hole 40, thereby carrying the seat plate 42 and thesliding box 41 out of the cabinet 4. Thus, the handle 1 can be operatedto unlock the sliding box 41 from the cabinet 4, allowing removal of thesliding box 41 out of the cabinet 4.

The connection axle 24 of the locking mechanism 2 is preferably rivetedto the through hole 420 of the seat plate 42. However, in actualapplication, the connection axle 24 can be configured to provide aninternal thread. When mounting the connection axle 24 in the throughhole 420, a fastening member is threaded into the internal thread of theconnection axle 24 to lock the connection axle 24 to the seat plate 42.Many various other known techniques can be employed to fasten theconnection axle 24 of the locking mechanism 2 to the through hole 420 ofthe seat plate 42 without departing from the spirit and scope of thepresent invention.

By means of biasing and hooking, the handle 1 is fastened to an outerside of the sliding box 41 in the cabinet 4 efficiently with lesseffort. In actual application, the handle 1 can be directly pushedtoward the seat plate 42 of the cabinet 4. Subject to the mating designbetween the beveled sliding edge 212 at one side of the insert plate 21of the locking mechanism 2 and the beveled guide edge 321 at one side ofthe hook block 32 of the positioning device 3, a guiding effect isprovided when the handle 1 is pushed toward the seat plate 42 of thecabinet 4, causing displacement of the insert plate 21 of the lockingmechanism 2 and the flat base 31 of the positioning device 3 along thebeveled sliding edge 212 and the beveled guide edge 321 respectively, sothat the engagement hole 40 of the cabinet 4 and the retaining slot 421of the seat plate 42 can be positively connected. In this way, theintuitiveness of the operation can be improved by directly pushing inand combining, so as to achieve convenience and simplify the operationand use.

In summary, the invention has the following advantages and features:

1. The two opposite sides of the handle 1 are fastened to the slidingbox 41 in the cabinet 4 by the locking mechanism 2 and the positioningdevice 3 respectively so that the handle 1 is firmly secured to thesliding box 41 without vibration and can be operated to push the slidingbox 41 into the cabinet 4 or to pull the sliding box 41 out of thecabinet 4. Further, the winding direction of the coiled positioningportion 221 of the torsion spring 22 of the locking mechanism 2 isparallel to the length direction of the handle 1 so that the thicknessof the torsion spring 22 is minimized, making the handle 1 relativelythinner for use in an electronic product having light, thin, short andsmall characteristics.

2. The outer cover 25 of the locking mechanism 2 is detachably mountedin the sliding space 12 of the handle 1, facilitating replacement of thetorsion spring 22 after dismounting of the outer cover 25. Further, theouter cover 25 is set in position by means of engaging the positioninglugs 254 thereof into the two opposite gaps 110 in handle shaft 11without additional fastening members, facilitating quick installation.

3. The insert plate 21 of the locking mechanism 2 is supported on thetorsion spring 22 for forward and backward movement in the sliding space12 of the handle 1, improving the overall actuation. Thus, the inventioncan tolerate more errors, thereby reducing the precision and difficultyin manufacturing. Further, the invention is applicable to differentsizes and types of cabinets 4.

4. After connection of the handle 1 to the sliding box 41 of the cabinet4, the hook block 32 of the positioning device 3 is hooked in theretaining slot 421 of the seat plate 42 of the sliding box 41 to securethe handle 1 firmly in position, locking the sliding box 41 to thecabinet 4 without vibration.

5. The two position-limiting plates 111 are curved from two oppositelateral sides of the handle shaft 11 of the handle 1 in direction towardeach other, so that the gaps 110 are defined between theposition-limiting plates 111 and the handle shaft 11. Through the gaps110, the sliding space 12 is allowed for the installation of the outercover 25, and the outer cover 25 can be used to protect the torsionspring 22 against impact and dust, prolonging the service life of thetorsion spring 22.

6. The two position-limiting plates 111 are curved from two oppositelateral sides of the handle shaft 11 of the handle 1 in direction towardeach other to form the respective arc-shaped lead edges 1112 thatenhance the structural strength of the handle 1 and facilitatinggrasping of the user's hand in a comfortable manner.

Although a particular embodiment of the invention has been described indetail for purposes of illustration, various modifications andenhancements may be made without departing from the spirit and scope ofthe invention. Accordingly, the invention is not to be limited except asby the appended claims.

What the invention claimed is:
 1. A handle mounting structure,comprising: a handle comprising a handle shaft, a sliding space definedin one side of said handle shaft and a mounting unit located at one endof said handle shaft; a locking mechanism mounted in said sliding spaceof said handle, said locking mechanism comprising an insert plateslidably inserted into said sliding space and a torsion spring mountedin said sliding space of said handle and stopped between said handle andsaid insert plate to impart a pressure to said insert plate toward theoutside of said sliding space, said torsion spring comprising a coiledpositioning portion mounted to said handle shaft within said slidingspace, an abutment end piece extended from one end of said coiledpositioning portion and stopped against said insert plate and a mountingend piece extended from an opposite end of said coiled positioningportion and positioned in said sliding space; and a positioning devicecomprising a flat base pivotally coupled to said mounting unit of saidhandle and a hook block located at a bottom side of said flat base. 2.The handle mounting structure as claimed in claim 1, wherein said handlefurther comprises two position-limiting plates respectively curved fromtwo opposite lateral sides of said handle shaft in direction toward eachother with a gap defined between each said position-limiting plate; saidlocking mechanism further comprises an outer cover disposed at an outerside relative to said insert plate and covered on said twoposition-limiting plates of said handle over said sliding space, saidouter cover comprising a plurality of positioning lugs respectivelyextended from two opposite lateral sides thereof and positioned in thesaid gaps between said two position-limiting plates and said handleshaft.
 3. The handle mounting structure as claimed in claim 2, whereineach said position-limiting plate comprises a plurality of insertiongrooves disposed in communication with an inner side of said slidingspace.
 4. The handle mounting structure as claimed in claim 2, whereineach said position-limiting plate comprises an arc-shaped lead edgelocated on an outer side thereof.
 5. The handle mounting structure asclaimed in claim 1, wherein said handle further comprises a streamlinetype grip extended from one end of said handle shaft.
 6. The handlemounting structure as claimed in claim 1, wherein said handle furthercomprises an opening defined in one end of the sliding space; saidinsert plate of said locking mechanism comprises a beveled sliding edgelocated on one end thereof, a retaining edge neighbored to a top side ofsaid beveled sliding edge, and an abutment edge located on an oppositeend thereof for abutment against said abutment end piece of said torsionspring.
 7. The handle mounting structure as claimed in claim 1, whereinsaid handle further comprises a mounting hole cut through said handleshaft and disposed in communication with said sliding space; said insertplate of said locking mechanism comprises an oblong sliding slot; saidlocking mechanism further comprises an outer cover disposed at an outerside relative to said insert plate and covered on said twoposition-limiting plates of said handle over said sliding space, saidouter cover comprising a through hole; said locking mechanism furthercomprises a connection axle mounted in said mounting hole of saidhandle, said oblong sliding slot of said insert plate and said throughhole of said outer cover for allowing said insert plate to be movedlinearly relative to said handle and said outer cover.
 8. The handlemounting structure as claimed in claim 1, wherein said handle furthercomprises a locating hole cut through said handle shaft and disposed incommunication with said sliding space; said coiled positioning portionof said torsion spring defines therein a through hole; said lockingmechanism further comprises a positioning axle with a shank thereofmounted in said locating hole of said handle and inserted through thesaid through hole of said torsion spring.
 9. The handle mountingstructure as claimed in claim 1, wherein said handle further comprises apositioning hole cut through said handle shaft and disposed incommunication with said sliding space; said locking mechanism furthercomprises an outer cover disposed at an outer side relative to saidinsert plate and covered on said two position-limiting plates of saidhandle over said sliding space, said outer cover comprising a stop platedefining an abutment surface for the abutment of said mounting end pieceand a mounting through hole cut through said stop plate and connected tosaid positioning hole of said handle with a fastening member.
 10. Thehandle mounting structure as claimed in claim 1, wherein said mountingunit of said handle comprises a mounting plate extended from said handleshaft, a mounting through hole cut through said mounting plate, anaccommodation notch located on a top side of said mounting plate, aswirl space defined in an opposing bottom side of said mounting platefor allowing said flat base of said positioning device to move therein,and a top edge disposed at an inner side of said swirl space andneighbored to said handle shaft; said positioning device furthercomprises an engagement groove defined in said flat base for receivingsaid mounting plate, a spring member loaded in said engagement grooveand positioned in said accommodation notch, an axle hole cut throughsaid flat base, and a pivot axle mounted in said axle hole and pivotallyconnected to said mounting through hole of said mounting unit.
 11. Thehandle mounting structure as claimed in claim 1, wherein the windingdirection of said coiled positioning portion of said torsion spring isparallel to the length direction of said handle; said abutment end piecedefines with the horizontal line of said coiled positioning portion apredetermined contained angle within 0˜90°.
 12. The handle mountingstructure as claimed in claim 1, wherein said positioning device furthercomprises a finger block extended from a top side of one end of saidflat base; said hook block of said positioning device comprises abeveled guide edge located on a front bottom side thereof.